Self-acting cushion and check valve.



w. L. osBoRNE.. SELF ACTING CUSHION AND CHECK VALVE. `'PLICATI D MAR. 191|..

3l l 9 l 7.

Patented Jan. 8, 19185.

on the valve piece.

WILLIAM L. osnonnn,

C0., 0F MILWAUKEE, WISCONSIN, A. CORPORATION 0F WISCONSIN.

SELF-ACTING CUSHION lAND CHECK VALVE.

inasaaaa Application tiled March 10, 1911, Serial No. $13,634:.

To all whom it may cof/wem:

Be it known that I, -WILLIAM L. OSBORNE, a citizen of the United States, and a resi*- dent of Chicago, in the county of Cook and State of Illinois, have' invented certain new and useful Improvements in Self-Acting Cushions and Check Valves; and I do hereby declare that the following is a full,fclear, and exact description thereof, reference being had to the accompanying drawings, and to the' characters of reference marked thereon,

`which form a part of this specification.Y

This invention relates to improvements in self-acting valves of that kind in which the Valvevpiece'is moved o its seat by a superior pressure below, and is automatically returned toits seat when the'pressure above exceeds the pressure beneaththe valve plece.

The invention relates to a construction and arrangement for cushioning ,the blow of the valve piece when it also to an improved the valve seat and the due to the wire drawing action of thehfiuid, upon the opening and closing movements of the valve piece. Certain of the features are also adapted to manually operated valves.

As shown in the drawings,-

Figure 1 is an axial sectionof a valve embodying my improvements. y

Fig. 2 is a similar section show-ing a modification. 2

the seat, and relates means for protecting rl`lie casin 10 of the valve shown in Fig. 1 is provided with branches 11 and 12 which'v are shown as interiorly screw-threaded for connection with the sections of a piping line in which the valve is incorporated. The casing is provided with an interior diaphragm 14, of common form, having a horizontally apertured portion 15 which carries the body seat of the valve. herein shown as formed on a separate ring 16 which is screw-threaded to the diaphra m and has a limiting or stop flange 16 whlch engages the upper portion of the diaphragm to limit its insertion thereinto. The ring is provided at its upper end with an interior annular conical seat 17 adapted. for engagement with a downwardly facing, annular conical seat 19 The said valve piece 18 is guided in its Specification of Letters Patent.

isfautomatically-sea'ted to I prevent wearlng impact of the valve againstv The body seat is face of the horizontal Patented Jain.. 8, 19182,

Renewed May 31, 1917. Serial No. 172,076.

movement toward and away fronrthe body seat by the lafuide lingers 20 made integral with and 'extending downwardly from a hollow plug 21 that is screw-threaded in an upwardly opening `nipple of the valve casing, `andl by other guide fingers 22 extendin downwardly from the valve piece throug and engaging the seat ring 16. The valve piece is formed at its top with an annular recess 24 and .is provided with a central stop lug 25 to engage a stop lug 26 extending downwardly from the top wall of the hollow plug 21 whereby vthe opening vmovement of the valve is limited. The hollow plug is in communication with the interior of the valve casing above the valve piece through the spaces between the guide lingers 20, and when they upper edge of the valve piece rises above the lower edge 2f( of the interor of the plug a body of luid is imprisoned in the hollow plug which cushions the opening of the valve, as will be evident. rl`he imprisoned fluid may escape slowly from the chambered plug through an opening 28 which extends to the exterior of thevalve piece. The pressure on the upper and lower sides of the valve piece is also equalized through said opening -to permit the valve to be closed at a time when the upper edge of the valve piece is above the edge 27` of the chambered plug. The valve piece isprovided on its lower side with a concentrically arranged exten-v sion 29 which, as herein shown, is made integral with 'the valve piece. The' said extension 29extends into and has a close slip it with the ring 16, or other passage which connects the two sides of the valve, at the most restricted diameter of said passage. T helestricted diameter of the ring in which said extension 29 lfits when the -valve is closed is located a distance below the plane of the body seat somewhat less than the distance between the plane of the seating face of the valve piece and the lowest `part of the extension '29. There is formed between the extension 29 and the seating face of the valve piece a chamber 30 which may be Aaugmented by cutting away the seat ring at 31. The arrangement of the extension 29 is such, with respect to the valve piece seat,` that said projectionremains in the most restricted part'of'the opening ofthe seat ring until the valve piece is moveda substantia distance from the body seat, and enters said' OF CHICAGO, ILLINOIS, ASSIGNOR TO THE RICHARDSON-PHENIX tot passage before said `valve piece closely ap- 'prcachesthe body seat. The extension 29/ therefore receives the wear due to the .high velocity of the fluid passing through tlie valve, and the body seat and Valve piece seat are thus protected against such wear.

The said chamber formed in the valve material thus imprisoned in the chamber 30.

escapes slowly therefrom between the body seat and valve piece seat and between the extension and restricted 1portion of the passage in the seat ring when the valve is closed, and `thus substantially slows the movement of the closing valve piece with the result stated. The said projection 29 and the concentric chamber 30 above the same thus performs the double function of protecting the body and valve piece seats from thel wearing action ofthe fluid and also protects said seat from the pounding action of the valve when it closes. A

The construction shown in Fig. 2 is generally similar to that shown in Fig. 1, and

' similar partsbear the same reference nuthe bod merals. As shown in said Fig. 2, there is provided at both radial sides of the valve seat or radially within or radially outside of the valve seat a cushioning chamber, the

lower cushioning chamber 30 and extension 29 being like the same parts shown in Fig. 1.

As shown in said Fig. 2, the flange33 of seat ring 16 shown in Fig. 2 is providec with an upstanding flange 34, and

,i the valve piece is made of a diameter above the valve seat to close fit within said flange 34, as shown at 35, The said valve piece is provided above its seat 19with an annular chamber 36, having the same function as the chamber 30. The chamber is formed to provide on the valve piece, around the same, a lip 37 which enters and closely fits within the flange 34, and preferably the lip 37 will be made of such length as to give it a slight lead beyond the projection 29 into the seat ring 16 so that 1t will enter the flange 34 just before said projection 29 enters the restricted portion of the seat ring.

With the construction shown it will be seen that the material or fluid passing through the valve will be imprisoned in both of the chambers36 and 30, one above and the other below7 the body seat, thereby providing a large cushioning body of the mate rial to cushion the seating force of the valve piece. lnasxnuch as the lip 37 enters the flange 34 prior to the entrance of the extension 29 into the restricted portion of the body seat ring, the fluid imprisoned will first escape between the projection 29 and the body seat ring andlafter the latter ,projection has entered the restricted portion of the body seat ring the fluid will be forced out also between the. lip 37 and the flange 34. The valve shown in Fig. 2 is more especially adapted to compressible fluids, such as air, steam and gas, although it may be used with valves adapted for vuse with liquids.

By reason of the` close fit between the lip 37 and the flange 34 and the fact that the lip remains within the flange until the valve piece and body seats are separated a substantial distance when the valve opens, and enters said flange 34 while'the, seats are yet separated a substantial distance when the valve is closing, it will be seen that the said lip 37 and'flange 34 acts inthe same manner as does the projection 29 to protect the body and valve piece seats by taking the wire drawing action of the fluid passing through the valve. Thus iin the construction .under discussion the wearing or wire drawing action of the high velocity fluid passing through the valve at the moment of opening `or closing is distributed between the projection 29 and the flange 34. It will be' of the fluid passing through the valve, in the same general manner that the projection body seatsfrom the wire drawing action v 29 is employed for protecting the valve seat.

The said part 29 constitutes an elongated projection of the valvev seat, while the part designated by 35 constitutes a radial projection of the valve piece for the same purpose. It will be furthermore obvious that so far as the seat protecting function of the lip 37 and the flange 34 is concerned, said parts may be employed on other than automatic or self-openin and closing valves, as for instance, valves liaving manually operable stems or like members to open and close the valve.

In the construction shown in F ig.'2, by reason of the greater lift of the valve piece, the hollow plug 21 thereof is made slightly longer, and the valve piece itself may be provided with guide fingers 38 to engage' the inner cylindric surface of the chambered plug. l

It will be understood that the construction shown is capable of some variation within the spirit and scope of the invention, and

Elli

described may be employed in a pump valve for pumping either gas or liquid, and the seats may be made otherwise than conical, metal to metal seats.

l claim as my invention z- 1. A self-acting cushioned valve having ay casing provided with an annular single facing tapered body seat, a valve piece which is provided with a single facing tapered seat to engage the body seat adapted to be freely movable toward and from the body seat by pressure of fluid moving through the valve, and fluid imprisoning means of substantial capacity located at both radial sides of the body seat to cushion the closing movement of the valve piece against the body seat.

2. A self-acting cushioned valve having a casing provided with an annular body seat, and a valve piece which is freely movable toward and from the body seat and adapted to be actuated by movement of fluid through the valve, there being two chambers in the valve piece each of a substantial area and one disposed at each radial side of the body seat and which coperate with a fixed part of the valve structure to receive and imprison therein bodies of fluid to cushion the closing movement of the valve piece against the body seat. p

3. A self-acting cushioned valve comprising a casing provided with an annular body seat which surrounds the passage that connects the two sides of the valve, and a pressure actuated valveV piece movable toward and from the body seat, said valve piece being provided with an extension which fits closely in a restricted portion of the passage below the body seat, an annular flange above and concentric with and spaced radially from the body seat, the valve piece above the seat being enlarged to fit closely within said flange, and said extension and valve piece being arranged to maintain a restricted area for fluid flowfbetween the same and the parts within which they closely fit when the valve piece is a substantial distance from the body seat, there being formed chambers in the valve piece above and below the body seat to imprison bodies of fluid to cushion the closing movement of the valve piece against the body seat.

4. A self-acting cushioned valve comprising a casing provided with an annular body seat'which surrounds the passage that connects the two sides of the valve, and a pressure actuated 'valve piece movable toward and from'the body seat, said valve piece being provided with an extension which closely fits in a restricted portion of the pas# sage below, the body seat, an annular flange Aabove and' concentric with and spaced radially fromthe body seat,V the valve Apiece above the body seat being enlarged to fit closely within said flange, and said extension and valve piece being arranged to maintain airestricted area for duid flow between the sides of the body seat to imprison bodies of fluid to cushion the closing movement of the valve piece against the body seat, the upper enlarged part of the valve piece being of a length to enter the flange before lthe projection enters the restricted portion of the passage.

5. A valve having an annular seat surrounding the passage which connects the two sides of the valve, the diameter of the passage at one side of the valve being less than the said seat and at the other side thereof being greater than the said seat, and a valve piece movable toward and from said 'seat and formed with parts which closely fit said smaller and larger diameters of said passage at the opposite sides ofthe seat.

6. A. valve having an annular seat surrounding' the passage which connects the two sides of the valve, and a valve piece -movable toward and from the seat, the passage at one side of the valve seat being of a diameter greater than the valve seat and the valve piece having a part which enters and closely fits, the larger diameter of said passage, the entrance to said greater diameter passage being unbroken and the contact between it and the valve piece beingof a lengthin the direction of the aXis ofthe valve piece to maintain a restricted areafor fluid flow between the same and the part of the passage in which it fits when the valve piece is a substantial distance from its seat to protect the valve seat from the wire drawing action of the fluid upon the opening and closing movements of the valve piece.

7. A valve having an annular seat surrounding the passage which connects the two sides of the valve, and a valve piece movable toward and from the seat, the passage at one side of the valve seat being of a diameter greater than the valve seat and the valve piece having a part which enters and closely fits the larger diameter of said passage, the entrance to said greater diameter passage beingunbroken and the Contact between4 it and the valve piece being of a length in they direction of the axis of the valve piece to maintain a restricted area forl `fluid How between the same and the part of the passage in which it fits when the valve piece is a substantial distance from its seat to protect the valve seat from the wire drawing action of the fluid uponV the opening and closing movements of the valve piece, there ree lill@ rae the opening in t e ring, a valve piece mov-` able toward and from the seat ring and havlng a part which fits closely within-said flange, the part which fits in said flange being of a length to maintain a restricted area for fluid flow between the same and-the flange when the valvepiece is a substantial distance from its seat, and an annular cham; ber surrounding the valve piece above the seat ring, said seat ring being provided withv a restricted passage and the valve piece being provided with an extension which fits closely thereinto and providedalso between the extension and the valve seat with an an nular chamber.

9. A self-acting` cushioning valve comprising a casing provided with an inlet and with an outlet and provided therebetween with a thoroughfare surrounded by an annular body seat, said-casing provided axially in line with said seat with an opening closed by a removable member, which latter is provided'with a cushioning chamber, a pressure-actuated valve piece guided by the walls of said thoroughfare and said cushioning chamber and movable Itoward and from sald seat and adapted to close the cushioning chamber to cushion the opening movement and the valve piece having an enlarged part v which enters and closely fits thelarger diameter of said conduit in advance ofthe seating of the valve piece, the clearance between said larger diameter of the conduit and the enlarged part of the valve piece being so small as to check the flow of material through the valve'upon theopening and closing of the valve and thereby protect the seat and the valve piece from the wire ldrawing action ofthe material passing through the said valve. f

ln testimony that I claim the foregoing as my invention I affix my signature in the presence of two witnesses, this 4th day of March A. D. 1911.

v WILLIr L. osBoaNE'. ,Witnessem l WM. L. HALL,` Wma; L. HALL. 

